*Department of Thoracic Surgery; and †Department of Pathology, West China Hospital, Sichuan University, Chengdu, 610041, China.
Disclosure: The authors declare no conflict of interest.
Address for correspondence: Lunxu Liu, Department of Thoracic Surgery, West China Hospital, Sichuan University, Chengdu, 610041, China. E-mail: firstname.lastname@example.org
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